Vegeta and Dean Winchester. Vegeta is a proud warrior, and Dean is a tough and no - nonsense hunter. They would have some great clashes at first due to their strong personalities. But when faced with a really powerful foe, like an archangel gone bad or a powerful alien threat in the combined universe, they would have to put aside their differences and fight side by side. Their combat styles could also complement each other, with Vegeta's energy attacks and Dean's weapon - based combat.
Gohan and Sam Winchester. Gohan is intelligent and has great power. Sam is also very smart and a powerful hunter. They could combine their knowledge of different worlds and powers to fight common enemies. For example, they could work together to stop a powerful demon that has somehow acquired ki - based powers.
Trunks and Castiel. Trunks is a time - traveling warrior from DBZ. Castiel is an angel who can also time - travel in a way. They could team up to fix some time - related issues in the combined fanfiction universe. Maybe there's a rift in time that's causing demons from Supernatural to invade the DBZ world at different points in time, and they have to work together to close it while also dealing with the various threats that pop up along the way.
Definitely Goku and Luffy. Goku is all about pure power and the pursuit of stronger opponents, while Luffy has his own brand of determination and his stretchy powers. Their combined energy would be so much fun to read about.
Sam Winchester and Daryl Dixon would be a great combination. Sam is intelligent and resourceful, and Daryl is a skilled tracker. They could share their skills and knowledge to survive in the zombie - filled world while also looking for a way to stop any supernatural forces at play.
Sasuke and Todoroki would be an exciting combination. They both have a bit of a dark past and are very powerful. Sasuke's Sharingan and Todoroki's dual - quirk abilities could lead to some really intense battles and strategic planning. They might start off as rivals but could eventually find common ground and work together, perhaps against a common enemy that threatens both their worlds.
A really cool character combination would be Hawk Moth and Vilgax. Hawk Moth's ability to akumatize people and Vilgax's thirst for power and his vast array of weapons and skills would be a terrifying combination. They could team up to take over both the Miraculous and Ben 10 universes. On the other hand, Tikki and Heatblast could also be an interesting pair. Tikki's positive energy and Heatblast's ability to generate and control fire could lead to some unique interactions. Maybe Tikki could help Heatblast control his power better or they could use their combined powers to defeat a powerful enemy.
I think it could also be a character like Itachi. His Sharingan gives him incredible combat abilities such as genjutsu and enhanced perception. If he were to get his hands on Halo technology, he could use it in very strategic ways. For instance, using a cloaking device to enhance his already stealthy nature from his ninja skills. And his intelligence would make him a force to be reckoned with in any 'naruto halo fanfiction' scenario.
I think Ruby and Violet would be really interesting. Ruby is all about speed and combat, while Violet is more reserved and has the power of invisibility and force fields. Their different personalities and powers could create some really cool interactions. Ruby could learn about being more stealthy from Violet, and Violet could learn about being more assertive in combat from Ruby.
Vegeta in his Ultra Ego form also has a claim to being one of the most powerful. He can absorb and use attacks against his enemies. However, in the Marvel side, characters like Sentry with his near - limitless power could also be a contender. In a crossover, it would be about who can adapt better to the other's fighting style and power system.
Another candidate could be Ruby with the Silver Eyes. If her power could be enhanced with DBZ - like Ki training, she might become the most powerful. But then there are also characters like Beerus who could potentially wipe out entire planets in both universes. So it's really a complex comparison.
It's really hard to say. Goku has the ability to reach extremely high power levels and transform into powerful forms like Super Saiyan God. However, Naruto has the Nine - Tails' chakra and the power of the Sage of Six Paths. If they were to combine their powers, they would be extremely formidable. But if we had to choose just one, it might be Goku in his Ultra Instinct form as his speed and power seem almost limitless compared to what we've seen in the Naruto universe so far.
It's likely to be Goku. His ability to constantly increase his power level through training and reaching new forms like Super Saiyan God and Ultra Instinct gives him an edge. He could potentially overpower most of the Bleach characters.